x^2+x+1=.99

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Solution for x^2+x+1=.99 equation:


Simplifying
x2 + x + 1 = 0.99

Reorder the terms:
1 + x + x2 = 0.99

Solving
1 + x + x2 = 0.99

Solving for variable 'x'.

Reorder the terms:
1 + -0.99 + x + x2 = 0.99 + -0.99

Combine like terms: 1 + -0.99 = 0.01
0.01 + x + x2 = 0.99 + -0.99

Combine like terms: 0.99 + -0.99 = 0.00
0.01 + x + x2 = 0.00

Begin completing the square.

Move the constant term to the right:

Add '-0.01' to each side of the equation.
0.01 + x + -0.01 + x2 = 0.00 + -0.01

Reorder the terms:
0.01 + -0.01 + x + x2 = 0.00 + -0.01

Combine like terms: 0.01 + -0.01 = 0.00
0.00 + x + x2 = 0.00 + -0.01
x + x2 = 0.00 + -0.01

Combine like terms: 0.00 + -0.01 = -0.01
x + x2 = -0.01

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
x + 0.25 + x2 = -0.01 + 0.25

Reorder the terms:
0.25 + x + x2 = -0.01 + 0.25

Combine like terms: -0.01 + 0.25 = 0.24
0.25 + x + x2 = 0.24

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 0.24

Calculate the square root of the right side: 0.489897949

Break this problem into two subproblems by setting 
(x + 0.5) equal to 0.489897949 and -0.489897949.

Subproblem 1

x + 0.5 = 0.489897949 Simplifying x + 0.5 = 0.489897949 Reorder the terms: 0.5 + x = 0.489897949 Solving 0.5 + x = 0.489897949 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 0.489897949 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 0.489897949 + -0.5 x = 0.489897949 + -0.5 Combine like terms: 0.489897949 + -0.5 = -0.010102051 x = -0.010102051 Simplifying x = -0.010102051

Subproblem 2

x + 0.5 = -0.489897949 Simplifying x + 0.5 = -0.489897949 Reorder the terms: 0.5 + x = -0.489897949 Solving 0.5 + x = -0.489897949 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -0.489897949 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -0.489897949 + -0.5 x = -0.489897949 + -0.5 Combine like terms: -0.489897949 + -0.5 = -0.989897949 x = -0.989897949 Simplifying x = -0.989897949

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.010102051, -0.989897949}

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